IBM HTTP Server 8.5/9.0 DDoS via mod_mem_cache
CVE-2026-8854 Published on May 26, 2026
IBM HTTP Server is affected by multiple vulnerabilities
IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service via the optional module mod_mem_cache.
Vulnerability Analysis
CVE-2026-8854 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Dangling pointer Vulnerability?
The program dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid. When a program releases memory, but it maintains a pointer to that memory, then the memory might be re-allocated at a later time. If the original pointer is accessed to read or write data, then this could cause the program to read or modify data that is in use by a different function or process. Depending on how the newly-allocated memory is used, this could lead to a denial of service, information exposure, or code execution.
CVE-2026-8854 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-8854
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Affected Versions
IBM HTTP Server:- Version 8.5.0, <= Interim Fix 002 is affected.
- Version 9.0 is affected.